package com.ruoyi.web.controller.common;

import java.io.File;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.ruoyi.common.enums.MimeTypeEnum;
import com.ruoyi.common.sdk.dxoos.OosConfig;
import com.ruoyi.common.sdk.dxoos.OosUtils;
import com.ruoyi.common.sdk.dxoos.RichTxtUtils;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.file.MimeTypeUtils;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    @Value("${oosPrefix}")
    private String oosPrefix;

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个） 上传到本服务器
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 返回图片oos地址
     * */
    @PostMapping("/uploadToOOS")
    public AjaxResult uploadToOOS(MultipartFile file) {
        try {
            String extension = FileUploadUtils.getExtension(file);
            if (!FileUploadUtils.isAllowedExtension(extension, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION)) {
                return AjaxResult.error("不允许上传" + extension + "格式文件");
            }
            String fileName = FileUtils.getName(file.getOriginalFilename());
            String suffix = DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD, new Date());
            OosUtils.putObject(FileUtils.transferToFile(file), fileName, OosConfig.OOS_BUCKET_NAME + "/" + OosConfig.OOS_BUCKET_PATH + "/" + suffix);
            String url = suffix + "/" + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", RichTxtUtils.getUrlById(url));
            ajax.put("fileName", url);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（单个）  返回图片服务器地址
     */
    @PostMapping("/uploadRichText")
    public AjaxResult uploadRichText(MultipartFile file) throws Exception {
        try {
            String extension = FileUploadUtils.getExtension(file);
            if (!FileUploadUtils.isAllowedExtension(extension, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION)) {
                return AjaxResult.error("不允许上传" + extension + "格式文件");
            }
            String fileName = FileUtils.getName(file.getOriginalFilename());
            String suffix = DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD, new Date());
            OosUtils.putObject(FileUtils.transferToFile(file), fileName, OosConfig.OOS_BUCKET_NAME + "/" + OosConfig.OOS_BUCKET_PATH + "/" + suffix);
            String url = suffix + "/" + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", oosPrefix + OosConfig.OOS_BUCKET_PATH + "/" + url);
            ajax.put("fileName", oosPrefix + OosConfig.OOS_BUCKET_PATH + "/" + url);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 获取oos文件
     */
    @ApiOperation(value = "获取oos文件")
    @GetMapping("/getOosObj")
    public synchronized void getOosObj(HttpServletResponse response, @RequestParam String fileName) throws Exception {
        if (org.apache.commons.lang3.StringUtils.isNotBlank(fileName) && !"undefined".equals(fileName)) {
            //对私有桶进行获取分享链接操作
            String url = OosUtils.generatePresignedUrl(fileName, OosConfig.OOS_BUCKET_NAME, 3);
            downloadPicture(url, response, fileName);
        }
    }

    //获取图片二进制
    private void downloadPicture(String url, HttpServletResponse response, String id) throws UnsupportedEncodingException {
        //设置字符集
        response.setCharacterEncoding("UTF-8");
        //防止中文乱码
        id = id.substring(id.lastIndexOf("/") + 1);
        String fileName = URLEncoder.encode(id, "UTF-8");
        //设置导出word文件格式
        response.addHeader("Access-Control-Expose-Headers", "Content-Disposition");
        response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
        //自动判断下载类型
        String contentType = MimeTypeEnum.getContentTypeByObjectName(fileName);
        response.setContentType(contentType);

        URL urlConnection = null;
        HttpURLConnection httpURLConnection = null;
        try {
            urlConnection = new URL(url);
            httpURLConnection = (HttpURLConnection) urlConnection.openConnection();
            InputStream in = httpURLConnection.getInputStream();
            byte[] buffer = new byte[10240];
            int len = 0;

            while ((len = in.read(buffer)) != -1) {
                response.getOutputStream().write(buffer, 0, len);
            }
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            httpURLConnection.disconnect();
        }
    }

}
